- Jellyfish have been on Earth for over 650 million years.
- Each red blood cell lives an average of 4 months and travels between the lungs and other tissue 75,000 times before returning to bone marrow to die.
- Blonde beards grow faster than darker beards.
- All pilots on international flights identify themselves in English regardless of their country of origin.
- The grapefruit gets its name from the way it grows in clusters like grapes on a vine.
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